// +build kafka

// Copyright 2018 StreamSets Inc.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package kafka

import (
	"errors"
	"github.com/Shopify/sarama"
)

type PartitionStrategy int

const (
	RANDOM      PartitionStrategy = iota
	ROUND_ROBIN PartitionStrategy = iota
	EXPRESSION  PartitionStrategy = iota
	DEFAULT     PartitionStrategy = iota
)

func getPartitionerConstructor(strategy PartitionStrategy) (sarama.PartitionerConstructor, error) {
	switch strategy {
	case DEFAULT:
		return sarama.NewManualPartitioner, nil
	case RANDOM:
		return sarama.NewRandomPartitioner, nil
	case ROUND_ROBIN:
		return sarama.NewRoundRobinPartitioner, nil
	default:
		return nil, errors.New("Unsupported/Unrecognized Partitioner Type")
	}
}
